Very often, you will come across examples in scuba education where what is taught does not match up with what divers do in real life. Mark Powell provides insights for new divers and tips for dive instructors.

The wolffish is known by many names, including loup de mer, ocean catfish, sea catfish or Atlantic catfish, striped wolffish, seawolf or seacat. All wolffish species are in the order of Cottiformes (which includes sculpins and relatives) and are in the family Anarhichadidae (wolffish). Lawson Wood gives us an insight into this intriguing creature.

Up until the ‘60s, the major advances in diving technology were driven by big-budget military programmes. Extending the depth limits to which divers might safely go—and still be capable of performing meaningful work when they got there—had a practical purpose. David Strike has the story, as told by George Wookey.

Many people suffer from ear problems during and after diving. Technical rebreather diver and underwater photographer Dr. Michael Rothschild is an ear, nose and throat specialist in New York City. In this series, he walks us through some of the common causes of dive-related ear problems, and how to treat and prevent them.